30
Multi Type Air Conditioner
Flaring Work and Connection of Piping
5. Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the
flared section and do flaring work again.
Inclined
Inside is shining without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
1. Form the piping according to its routing.
Avoid bending and bending back the same
piping point more than three times. (This will
result in hardening the pipe.)
2. After deforming the piping, align centers of
the union fitting of the indoor unit and the
piping, and tighten them firmly with
wrenches.
3. Connect pipe to the service valve, ball valve
or short tube(only 48k) which is located.
4. After completing the piping connection, be
sure to check if there is gas leakage in indoor
and outdoor connection.
Vacuum drying
After completing the piping connection, execute
vacuum drying for the connecting piping and
the indoor unit.
The vacuum drying must be carried out using
the service ports of both the liquid and gas side
valves.
Connection of the pipes-Outdoor
1. When piping installation work you must be
used the connector.
Connecting pipe size
Outdoor
unit
Short tube
(48k)
Liquid side
Flare connection
Flare connection
Gas side
Indoor
unit
A
B
Gas
A
B
24/30/36 kBtu/h
Ø12.7(1/2")
Ø15.88(5/8")
Capacity
Capacity
Gas side
Liquid side
12/18 kBtu/h
Ø12.7(1/2")
Ø6.35(1/4")
24/30/36 kBtu/h
Ø15.88(5/8")
Ø6.35(1/4")
48 kBtu/h
Ø19.05(3/4")
Ø9.52(3/8")
Piping Connection
Summary of Contents for L5UC728FA0
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